Art of casting non-ferric metals.



F. J. PHILLIPS. ART OF CASTING NON-FERRIO METALS.

APPLICATION FILED 8BPT.1, 1910.

Patented Dec. 6,1910.

Inventor:

A FIG. Z.

Witnesses Attorneys.

rns NORRIS PETERS cm, WASHINGTON. 04 c4 UNITED STATES PATENT GFFIGE.

FRANK J. PHILLIPS, OF CHICAGO, ILLINOIS.

ART OF CASTING NON-FERRIC METALS.

To all whom it may concern;

Be it known that I, Fnam; J. PHILLIPS, a citizen of the United States,and resident of Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in the Art of CastingNon-Ferric Metals; and I do hereby declare that the followingdescription of my said invention, taken in connection with theaccompanying sheet of drawings, forms a full, clear, and exactspecification, which will enable others skilled in the art to which itappertains to make and use the same.

This invention has general reference to the art of producing non-ferricmetal castings, such as are made in brass foundries and especially thatclass of castings which are produced in large quantities, and which aregenerally termed straight work, that is to say, work which is producedfrom gated patterns, and which runs either continuously or repeats atgreater or lesser intervals of time. This class of patterns are almostinvariably molded in standard flasks,

but in many cases these flasks are too large or too deep, or both, tosuit the work, there by causing considerable loss and waste of sand andlabor in handling the same to produce the molds. On such straight work,the best output on the tub in brass foundries is thirty molds per day,while by my improved system of producing these castings I am enabled tomake twice and three times this number of molds in the same time withoutany, or but a very few scrap or defective castings.

To attain these very desirable and impor tant results, my inventioncomprises the employment of a series of flasks, the exterior shape anddepth of which is governed entirely by the shape and thickness of thecastings to be produced. In these flasks I form a series of partitions,so that each pattern on the gate is contained in a separate compartment,each compartment being separately rammed. I then bake these molds in abake oven to make them very hard and easily handled, so that no gasesare formed in said molds when the molten metal enters the same, therebypreventing oxidation of the metal and blow-holes, cold shuts, and otherdefects in the castings, vents being drawn from the sides of the flasks,preferably from each compartment to provide for the escape of air fromthe mold when the metal enters the same.

Specification of Letters Patent.

Application filed September 1, 1910.

Patented Dec. 6, 1910.

Serial No. 580,052.

In the drawings already mentioned,which serve to illustrate thisinvention more fully, Figure 1 is a plan of a flask employed in mysystem of producing castings. Fig. 2 is a side-elevation of the same.Fig. 3 is a longitudinal sectional elevation thereof, on line as m ofFig. 1. Fig. 1 is a cross-section drawn on an increased scale, thefigure being taken on line 3 y of Fig. 1.

Like parts are designated by corresponding symbols and characters ofreference in all the figures.

A, in these drawings designates the cope, and B, the drag of a moldersflask adapted for use in brass foundries in connection with my system ofproducing non-ferric metallic castings. The exterior contour of thesetwo parts of the flask is of a shape approximately conforming to theshape of the castings to be produced which may vary almost infinitely.In the drawings, I have indicated these castings as being circular disks12, and, therefore, the outer walls 13, 13 14:, 14 of these flaskmembers are formed of curved outlines, but it is to be understood thatthis outer contour of the flasks will vary with the shape of thecastings required. In these flask members I form a series ofintersecting partitions of which the longitudinal central partition 15,is of a height at the ends where they adjoin the end-members 19, 19, 20,20, corresponding to the height of the flask members. This centralpartition is cut away at its inner edge to provide for space 16, for therunner or gate of the pattern. I also form in these flask members crosspartitions 17, 17 which cross partitions are also of a depthcorresponding to the depth of the flask members A, B, thereby providingin each flask member a series of compartments 18, one for each pattern.In the side walls of these flask members I also provide vent openings18, preferably one for each compartment to permit air escaping throughsaid openings from said'compartments when the metal is being poured intothe mold.

The flask members A B are provided with the usual dowel pins and lugs21, adapted to properly locate the two flask-members upon each other,and also with the pouring spout members 22, 22*, as well as with theusual lifting lugs 23, 23 at the bottom members of said flask, asclearly shown in the drawlngs.

The operation of molding in my present system diflers from that usuallyemployed in brass foundries that each compartment containing one of thegated patterns is filled with sand and separately rammed and then ventedthrough the vent holes 18 in the side walls of the flask members. Theseflask members fit the patterns very closely, leaving but sufficientspace between them and the walls of the flask and partitions to containthe minimum amount of sand, and they are so shallow that but a thinlayer of sand covers the patterns. In this manner I save a largequantity of molding sand which at present is wasted, and alsoconsiderable time in the handling of the sand, the ramming of the samein the flask, &c.

After the patterns have been withdrawn from the flask, each flask memberis placed in a bake oven where the sand is baked quite hard to eliminatetherefrom all moisture so that when the two flask members are clampedtogether by suitable clamps, not shown, the mold is ready for pouring,where owing to the entire absence of moisture, and the pe culiarventing, I produce castings of a superior quality practically tree fromimperfections and without any loss, at a much lower cost than what suchcastings have heretofore been produced.

In carrying out this system of producing castings, I am enabled toemploy less skilled help than what is now required to produce this classof work, in tact boys can be economically employed who after a veryshort practice will produce as many and as good castings as any skilledbrass molder.

When the castings to be produced are very small, I may bunch a number ofthe patterns for the same in each compartment and proceed with themolding, venting, baking, setting cores, when required, and the pouring,the same as heretofore described.

While my present system of producing castings is especially designed fornonferric metals, such as brass, bronze, aluminum and the alloysthereof, it is obvious that the same system may be effectively employedin the production of ferrous metal castings without change and withoutdeparting from the scope or" my invention.

Having thus fully described this invention, I claim as new and desire tosecure to me by Letters Patent of the United States- A two-part flask,comprising two like members open at top and bottom, there being in saidmembers a longitudinal partition and a series of transverse partitionsaffording separate compartments each of which is adapted to receive oneor more patterns, the inner edges of said transverse partitions being incontact with each other except at their intersection with said centralpartition, when said flask is in closed condition, a pouring-spoutmemher on each flask-member and formed integral therewith, and means onsaid flaskmembers adapted to properly locate one flask-member upon theother.

FRANK J. PHILLIPS.

IVitnesses:

MICHAEL J. STARK, LEON DONNE.

